The world got you down? Wish you could escape to somewhere calm, beautiful, and quiet? No problem! Just hop into one of these amazing one-man submersibles, take a deep breath, and propel yourself down into the deep blue sea. Serenity awaits.

This is the Nordenfelt I, 1884 brainchild of Swedish inventor and industrialist Thorsten Nordenfelt 1884

One of the two Resurgam, an early Victorian submarine designed and built in Britain by Reverend George Garrett in 1878-79. The Resurgam I was a hand powered, one-man submersible; the Resurgam II had a three-man crew, and was steam-powered.

Photo: Garrett/Henry Guttmann/Getty Images

A submarine motor car, invented by Michel Andre in 1937.

Horace Abrahams/Fox Photos/Getty Images

The Motorised Submersible Canoe (MSC)—nicknamed 'Sleeping Beauty'—was a British underwater reconnaissance or attack vehicle for a single frogman during World War II.

Photo: National Archives of England, Wales and the UK Government

The Biber, a German midget submarine of the German Navy during the second World War, came armed with two externally mounted torpedoes.